Vítor Lourenço, Gabriela Silva, and Leandro Fernandes. 2019.
 Hierarchy-of-Visual-Words: a Learning-based Approach for Trademark Image Retrieval. In <em>Anais da XXXII Conference on Graphics, Patterns and Images</em>, outubro 28, 2019, Rio de Janeiro, Brasil. SBC, Porto Alegre, Brasil. DOI: <a href="https://doi.org/10.5753/sibgrapi.2019.9803">https://doi.org/10.5753/sibgrapi.2019.9803</a>.